The A-flat dominant thirteenth chord (abbreviated "Ab13 chord") is a seven-note chord consisting of the notes A, C, E, G, B, D, and F. The chord is formed by adding a thirteenth to a A-flat dominant eleventh chord.

In practice, the fifth (E) and eleventh (D) are often omitted from the Ab13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.

Name
A-flat dominant thirteenth chord
Notes
A C E G B D F
Intervals
1 3 5 7 9 11 13
Chord symbol
A13
Type
Heptad (seven-note chord)

Ab13 chord on piano

Ab13 chord on guitar

Ab13 chord on ukulele

Ab13 chord on the staff